Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — RANKINGS/OH/SMALLEST-AREA

Smallest ZIP Codes in Ohio by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 45501 Springfield Clark 0.01 sq mi
2 45423 Dayton Montgomery 0.01 sq mi
3 43047 Mingo Champaign 0.01 sq mi
4 44630 Greentown Stark 0.01 sq mi
5 45105 Bentonville Adams 0.01 sq mi
6 45119 Feesburg Brown 0.01 sq mi
7 43117 Derby Pickaway 0.02 sq mi
8 44901 Mansfield Richland 0.02 sq mi
9 45469 Dayton Montgomery 0.02 sq mi
10 43032 Kilbourne Delaware 0.02 sq mi
11 43439 Lacarne Ottawa 0.02 sq mi
12 44232 Green Summit 0.02 sq mi
13 45624 Cynthiana Pike 0.02 sq mi
14 43434 Harbor View Lucas 0.02 sq mi
15 45618 Cherry Fork Adams 0.03 sq mi
16 45721 Coal Run Washington 0.03 sq mi
17 44856 North Robinson Crawford 0.04 sq mi
18 43736 Fairview Guernsey 0.04 sq mi
19 45642 Jasper Pike 0.04 sq mi
20 45267 Cincinnati Hamilton 0.04 sq mi
21 43909 Blaine Belmont 0.05 sq mi
22 44881 Sulphur Springs Crawford 0.06 sq mi
23 43738 Fultonham Muskingum 0.06 sq mi
24 43974 Harrisville Harrison 0.08 sq mi
25 45838 Elgin Van Wert 0.08 sq mi
26 43505 Blakeslee Williams 0.09 sq mi
27 43142 Milledgeville Fayette 0.09 sq mi
28 44101 Cleveland Cuyahoga 0.09 sq mi
29 43218 Columbus Franklin 0.09 sq mi
30 44555 Youngstown Mahoning 0.09 sq mi
31 44825 Chatfield Crawford 0.10 sq mi
32 45720 Chester Meigs 0.10 sq mi
33 45866 Montezuma Mercer 0.10 sq mi
34 43027 Homer Licking 0.11 sq mi
35 43330 Kirby Wyandot 0.11 sq mi
36 45301 Alpha Greene 0.11 sq mi
37 45156 Neville Clermont 0.12 sq mi
38 43836 Plainfield Coshocton 0.12 sq mi
39 45848 Glandorf Putnam 0.13 sq mi
40 45316 Clifton Clark 0.13 sq mi
41 43972 Bannock Belmont 0.13 sq mi
42 43350 Sparta Morrow 0.14 sq mi
43 43530 Jewell Defiance 0.14 sq mi
44 43740 Gratiot Licking 0.14 sq mi
45 44670 Robertsville Stark 0.14 sq mi
46 45352 Palestine Darke 0.15 sq mi
47 43934 Lansing Belmont 0.15 sq mi
48 45132 Highland Highland 0.15 sq mi
49 43321 Fulton Morrow 0.15 sq mi
50 45893 Vaughnsville Putnam 0.15 sq mi

Showing the top 50 of 1,233 ZIP codes in Ohio that have this figure and meet the threshold above. 45501 ranks 1st at 0.01 sq mi, against 0.15 sq mi in 50th place.

Other rankings for Ohio

Cite this page

zipcodes.pro. “Smallest ZIP Codes in Ohio by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/oh/smallest-area

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